Carriage-feed mechanism for lathes.



F. HAnmNGE. CARRIAGE FEED MECHANISM FOR LATHES.

PPLICUON FILED Nov- 8.1916. ,285,693. Patented Nov. 26, 1918,

UNIT-ED.- srarns. Barnier 4Brion.,

rnnigiinrnnnnnmen, or omelie@ ILLINOIS, AssIGNOR To ImItDIIrOae` BROTHERS,

orgcnroaeo; ILIIIIIOIs n CORPORATION OFILLINOIS. f

.Bef .it .hennfthet L .FieeNiLIN ,HeeiNeaa citizen of theUnitedStates,.residingat Chicago, in thea-Cellular.. et` fGOek-v-end l.Siate 0f,.-Ill. n0ie.,. havey invented-Germanen and Mv mventedl relatesY te. Carriage, feed,`

meehenism. for lathes tand; particularly te deriees fein` etteehing. Carriage; feed t rod; or carriage lead screwf-toa. drlving shaft extending-from the change-gear .Y 012v transmissionllcasing, J so as.Y to A preyentA t relative movement between, theQfeedurod, or. lead.

. Seres' end fhe.driving...eheft5endto. .permitthe-rod `or` screwv to b'e.`detached fronnthe by', rod or,

letheand. substituted screvv` hayingdiflerent pitch threads-or havngiisome Charactl'sililc, .dllerenlf imma the, onenemoved.; 1 f y In the-preferred. form of` my invention I` PrOYide d, driving Shaft. ,extendida t from,-

thegtransnssioneor change gear Vcasing 1having secured thereto a, j collar orj ,sleeve pro` jecting beyond thependoffthedrivingshaft. The: feed rod :ort -lead screiv is, adapted to extend `linto .the sleeve,,andis provided With-- pansible member with thesleeve and for.,

expanding the,me 1nber against the Wallsoi the feedfrod. orv leadscrew, thus securely holding the. rodor,` screwsagainst relative movement-between -it andthe driving shaft, which, of course,d is" necessary in y theproduction-,ofaccurate Work.4

Theseand other-objects'of my invention are .more clearly brought f out in connection with the accompanying drawings, wherein- Figurelv isfa. fragmentaryk cross-sectional Viewfof a portion of the change xspeed gearing-casing of sth e .-lath e,y a driving shaft and a1feed-rod`,or-, ,lead screw, together with the `deyioe`v of my L invention Afor; attaching the rod n o'r-v screw to thei drive shaft;

VFigQisl a fragmentaryrsidehvievv of a feedvrod or lead screwprovidedwith a slot for the reception of the ,expansible plug;

,f Eig'g isa erosssetional,viewptaken along Specification of Letters Patent. Patentgd NOV, 26,1918 Applvipatiqn sieqnvemper s, 191e. serial No. 130,127.

the line 38 of' Fig. l and looking in the direction indicated bythe arrows, and

Fig. 4 is a detailed Side elevational'view ofthejexpansible plug. i t

SimilarV4 characters of referencev refer to similar parts throughout the severalviews. Refering first to Fig.. 1, 5y illustrates ar portion ofthe transmissionor change gear casing usually located atthe head `stock end ofr thelathe. The driving shaft 6 extends fromthe change speed kgearing Within ,theI

is, provided with the roller casing 5, and

bearings 7 for journaling one endpofthe vshaft in the. gear casing. The outerfend or the end Which extendsX of. the shaft 6 n throughthe gear, easingf has rigidly at-i tached uthereto a collar for sleevevS. Any suitable means maybe employed for attaching the sleeve 8 to the driving shaft 6, such for example as the taperedpin[illustratedk at 9, which extends throughthe sleeve/8x and through the driving-shaft 6,

The sleeve 8 as mostvclearly illustratedin Fig., l extends beyond the end: of lthe shaft 6 to receive the end of the feed rod or lead screw 10.. ,That portion ofthe lead `screw 10 which extends rinto the lsleeve 8 isfprovided l Witha vslot 11 The slot,11.is

providedin the leadscrevvis arranged to.

which extends lsubs tantially Y at right angles to the axis of the lead screivll preferably provided with the i shoulder or, ledgelZ, the purpose of Which. in theE sleeve, with a. slot, arranged to receive .Y enlexpeneble memberA Means are provided,v sueltas a teperedpin ferecenrleetne theexf` receive the eXpansibleU-,shapedl plug 13 containing theucuta'way; portion 14. adaptedy to register with A the ledge or shoulder 12 of the [lead Y screw.v The inner.A face of( the U shaped member 13 is tapered, as illustrated in land is arrangedto cooperate with a correspondingly .tapered pinvl, which eX,-v tends. th-I'jough the/.aperture ,16 provided in the `sleeve A8 and into or` preferably through theaperture17 carried by the ysleeve opposite the opening 16. The U shaped expansi-` ble plug y13 isl tapered inthe sainedirectio'n in which thepin 15 is tapered-,aridto insure the proper theslot 1l :thev ledgel2 afndcut-avvay portion 111 areV provided.

In" assembling together .with the expansible yplug 13 is in- A 10o positioning of the plugl Withijui,y

the deviceA the lead .screw sei-ted into thesl'eeve ,and thetapered pinjf 15 ,inserted through the reldertii'ie lfvof the sleeve through the. expz'insilole. las, illus,

A the sleeve 8 as trated in Figs. 1 and 3, and through the aperture 17 of the sleeve. As the tapered pin 15 is driven in with a suitable tool the member 13 is caused to expand in the tvcoL for expanding the plug and securely holdlg-ing the feed rod against movement relative Vjto the sleeve.

L1. Carriage feed mechanism comprising directions parallel to the axis of the feed rod-u;V ,a driving shaft, a sleeve secured thereto and or lead screw 10 and moved in a directioni; toward the base of the slot 11. nection is therefore made between the leadt` screw and the plug 13 as Well as between the plug and the tapered pin 15, thus securely'i' locking the feed rod or lead screvv againsti relative movement between it and the driv ing removed back through the sleeve. The lead screw may then be removed and substituted by an-. other. As most clearly illustrated in Figs. 3 and 11 the expansible plug 13 is of a size exactly the same as the slot or cut-away portion 11 of the lead screw with the exception of the central tapered slot provided in the plug.

Although I have described and illustrated being secured to the driving shaft 6 and the lead screw as being provided vvith the connecting means of in invention, 1 Wish it to be understood that the parts may be reversed, that is, the sleeve 8 may, if desired, be attached to the lead screw 10 and the driving shaft provided with the slot and locking plug.

Having thus described my invention, what claim as new and desire to secure b v Letters Patent of the United States is:

1. Carriage feed mechanism for lathes comprising a driving shaft, a collar secured thereto and projecting beyond the end thereof, a carriage feed rod projecting into said collar and provided With a slot Within the collar, an expansible plug tting in said slot, and a tapered pin extending through the collar and the plug for expanding the plug and securely holding the feed rod against movement relative to the collar.

2. A device of the class described comprising a driving shaft, a carriage feed rod provided with an opening, and devices connecting the driving shaft and the feed rod including an expansible plug fitting in the said opening, and means for expanding the plug and securely holding the feed rod against movement relative to the driving shaft.

3. A carriage feed mechanism comprising a driving shaft, a sleeve secured thereto and projecting beyond the end thereof, a carriage feed rod extending into said sleeve and being provided inside the sleeve With a slot extending substantially at right angles to the rod, an expansible plug fitting in said rod, said plug being provided With a tapered bore, and a correspondingly tapered pin extending through the sleeve and plug tight con-;

shaft 6. If the lead screw 10 is t0 bei" for any reason the tapered pin 15;l is removed by applying a suitable tool tof;k the tapered end of the pin and forcing it ,o

projecting beyond the end thereof, a car- Iriage feed rod extending into said sleeve 'f and being provided inside the sleeve With a slot extending substantially at rightangles to the rod, a U-shaped plug fitting in said slot, and a tapered pin extending through f the sleeve and plugl for expanding the plug and securely holding the feed rod against movement relative to the sleeve.

5. Carriage feed mechanism for lathes comprising `a driving shaft, a sleeve secured thereto and lprojecting beyond the end thereof, a carriage feed rod extending into said sleeve and being provided inside the sleeve with a slot extending substantially at right angles to the rod, a tapered U shaped plug fitting in said slot, and a correspondingly tapered pin extending through the sleeve and plug for expanding the plug and securely holding the feed rod against movement relative to the sleeve.

6. Carriage feed mechanism.- for lathes comprising a driving shaft, a sleeve secured thereto and projecting beyond the end thereof, a carriage feed rod extending into said sleeve and being provided inside the sleeve with a slot extending substantially at right angles to thc feed rod, a U shapedplug fitting in the slot and having its base at the bottom of the slot and its upper end'rounded to correspond with the feed rod, and a tapered pin extending through the sleeve and the plug for expanding the plug and securely holding the feed rod against movement relative to the sleeve.

7. Carriage feed mechanism for lathes comprising a driving shaft, a sleeve secured thereto and projecting beyond the end thereof, a carriage feed rod extending into said sleeve and being provided inside the sleeve with a slot extending substantially at right angles to the feed rod, a tapered U shaped plug fitting in the slot and having its base aty the bottom ofthe slot and its upper end rounded to correspond with the feed rod, and a correspondingly tapered pin extending through the sleeve and the U shaped plug for expanding the plug and securely holding the feed rod against movement relative to the sleeve.

8. A. device of the class described comprising a driving shaft, a sleeve attached thereto and projecting beyond the end thereof, driven rod extending into said sleeve and provided therein with an opening extending substantially at right angles to the driven shaft, and an expansible plugiitting in said opening for connecting the driven shaftwith said sleeve.

9. Carriage feed mechanism for lathes comprising a driving shaft, a carriage feed rod, a sleeve secured to one of said members v and extending beyond the end thereof to receive the other member, the said other member being provided with a slot extending substantially at right angles thereto, an

expansible plug itting in said slot, vand a tapered pin extending through the sleeve and plug to expand the plug and for seourely holding the feed rod against move- 10 ment relative to the sleeve.

In Witness whereof, I hereunto subscribe my name this 3rd day of November, A. D.

FRANKLIN HARDINGE. Witnesses:

ROBERT F. BRACKE, ALFRED S. CALLAWAY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

